Of parachutes and things

Was hoping to get a bit of expertise here. I'm in the market for an
emergency bailout chute for flying in my Pitts S-1D. The top US contenders
seem to be National and Softie but with no experience in the field, and
parachutes not exactly being the kind of object you can try on for size in
the shop, I don't really know what to look for and what to avoid. I'd
appreciate any tips anyone out there could provide. Are there any European
models that anyone has any experience with? Obviously comfort and space in
the cockpit are major considerations.

Thanks!
Shawn